{
  "manageEntity": {
    "action": "Save",
    "entityId": "1495512859",
    "entityType": "Track",
    "nonce": "0xc3c5e56c062566432fc269dfa1e5cea18002c3ad6e980231036ebe2614af0d57",
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    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
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}